⚠️ Check whether Jupyter is already installed on your computer by entering `jupyter` in a Terminal.
The easiest way to install Jupyter is to install Anaconda.
Below are step-by-step instructions for (a) installing Anaconda (Individual Edition), then (b) checking the Jupyter installation.
Terminal and selecting Terminal.app
./Applications/Utilities/Terminal.app
jupyter notebook to launch Jupyter.
If you have multiple browsers, you may be prompted to choose a browser.
Choose any browser (e.g. Safari, Firefox, Google Chrome, etc.)
When the Jupyter home page launches, select New, then select a Python 3 Notebook.
print( "Hello world!" ) in the cell, then select Run.
Hello world! is printed as output.